* {@code get(null)}, {@code keySet().contains(null)} or {@code remove(null)}.
   */
  ALLOWS_NULL_KEY_QUERIES,
  ALLOWS_NULL_KEYS(ALLOWS_NULL_KEY_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code
   * containsValue(null)}, {@code values().contains(null)} or {@code values().remove(null)}.
   */
  ALLOWS_NULL_VALUE_QUERIES,

        append(tags)
      }
      append('}')
    }

  open class Builder {
    internal var url: HttpUrl? = null
    internal var method: String
    internal var headers: Headers.Builder
    internal var body: RequestBody? = null
    internal var cacheUrlOverride: HttpUrl? = null
    internal var tags: Tags = EmptyTags

    constructor() {
      this.method = "GET"
      this.headers = Headers.Builder()

    @Override
    public Date getBuildStartTime() {
        return buildStartTime != null ? new Date(buildStartTime.toEpochMilli()) : null;
    }

    @Deprecated
    @Override
    public void setBuildStartTime(Date buildStartTime) {
        setBuildStartInstant(buildStartTime != null ? Instant.ofEpochMilli(buildStartTime.getTime()) : null);
    }

    @Override
    public Instant getBuildStartInstant() {

    cache?.trackResponse(strategy)

    if (cacheCandidate != null && cacheResponse == null) {
      // The cache candidate wasn't applicable. Close it.
      cacheCandidate.body.closeQuietly()
    }

    // If we're forbidden from using the network and the cache is insufficient, fail.
    if (networkRequest == null && cacheResponse == null) {
      return Response
        .Builder()
        .request(chain.request())

      var sha1: ByteString? = null
      var sha256: ByteString? = null

      for (pin in pins) {
        when (pin.hashAlgorithm) {
          "sha256" -> {
            if (sha256 == null) sha256 = peerCertificate.sha256Hash()
            if (pin.hash == sha256) return // Success!
          }
          "sha1" -> {
            if (sha1 == null) sha1 = peerCertificate.sha1Hash()

    private final File acceptedViolationsDir
    private Map<String, String> acceptedViolations = null

    AcceptedViolationsProvider(Directory acceptedViolationsDir) {
        this.acceptedViolationsDir = acceptedViolationsDir.asFile
    }

    Map<String, String> get() {
        if (acceptedViolations == null) {
            acceptedViolations = AcceptedApiChanges.parse(
                acceptedViolationsDir.listFiles()

    assertFalse(table.contains("foo", 2));
    assertFalse(table.contains("bar", 3));
    assertFalse(table.contains("cat", 1));
    assertFalse(table.contains("foo", null));
    assertFalse(table.contains(null, 1));
    assertFalse(table.contains(null, null));
  }

  public void testContainsRow() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertTrue(table.containsRow("foo"));

        return context.getValue(expression) != null;
    }

    public Object getValue(String expression) {
        try {
            return context.getValue(expression);
        } catch (JXPathNotFoundException e) {
            return null;
        }
    }

    public boolean xPathExpressionEqualsValue(String expression, String value) {
        return context.getValue(expression) != null

   *
   * @return {@code first} if it is non-null; otherwise {@code second} if it is non-null
   * @throws NullPointerException if both {@code first} and {@code second} are null
   * @since 18.0 (since 3.0 as {@code Objects.firstNonNull()}).
   */
  public static <T> T firstNonNull(@Nullable T first, @Nullable T second) {
    if (first != null) {
      return first;
    }
    if (second != null) {
      return second;
    }

        .build(),
    )
    val source = newEventSource()
    assertThat(source.request().url.encodedPath).isEqualTo("/")
    listener.assertOpen()
    listener.assertEvent(null, null, "hey")
    listener.assertClose()
  }

  @RetryingTest(5)
  fun cancelInEventShortCircuits() {
    server.enqueue(
      MockResponse
        .Builder()
        .body(
          """